What do astrophotographers do when it's cloudy? They look back at their old data and see if they can improve upon it. In this video I do just that. I take my Rosette Nebula data from January 2021 and reprocess it using the techniques I've learnt this year. Previously I processed this using photoshop and I ended up with big stars, grain etc. but with PixInsight I ended with an image I am much happier with. Join this channel to get access to perks: https://www.youtube.com/channel/UC_uaPllx6WHYms0H0BDZY-Q/join Blog: https://astrojourneyuk.com/2022/02/20/why-you-should-go-back-and-process-old-data/ Instagram: https://www.instagram.com/astrojourneyuk/ Facebook: https://www.facebook.com/astrojourneyuk/ Twitter: http://www.twitter.com/astrojourneyuk/ Lukomatico's channel can be found here: https://www.youtube.com/c/lukomatico